Chain-wrench



(No Model.)

WVVNE: 5555 F. B. IDE.

CHAIN WRENCH.

L Patented Aug. 11, 1891.

YUNITED STATES PATENT OFFICE.

FREDERICK B. IDE, OF TROY, AssIeNOR TO NATI-MED. IDE, OF OORINTH,

NEW YORK.

CHAIN-WRENCHI SPECIFICATION forming part of Letters Patent No. 457,535, dated August 11, 1891.

Application iiled April 1, 1891. Serial No. 387,210. (Nomodel.)

To all whom t may concer-n.-

Be it known that I, FREDERICK B. IDE, of the city of Troy, county of Rensselaer, and State of New York, have invented a new and useful Improvement in Chain-lVrenches, of which the following is a specification.

My invention relates to improvements upon that class of wrenches which are made with two jaws that are projected from the end at the sides of an operating-handle, so as to leave an intermediate chain-passage between the jaws, and a chain made of links, which chain at one end is connected to the jaws at the handle-head, where it can be passed around the pipe to be turned, and from where in part encirclingthe latter, so as to hold it against the face of the jaws, the chain is carried backward between the latter, so as tO draw it against the jaw-faces when the handle is operated. This class of wrenches are mainly used f or screwing pipes, cylinders, or rods into a threaded connection, and are terme( chain-wrenches.

My invention consists (as will be Inore fully described hereinafter in connection with its illustration) of a chain-wrench made of links having each on what is its inner edge when in use an angular form and a grip-point produced by the latter, and which links to produce the chain are arranged in connected series of links, each of which series of links alternatingly contains an odd and even number of links with the links of each series parallel to each other, and with the opposite ends of each series having an even number of links arranged to tongue into and between the ends of the links of a series containing an odd number of links and be pivoted thereat.

Accompanying this specification to form a part of it there is a sheet of drawings containing seven figures illustrating my invention, with the same designation of parts by letter reference usedin all of them.

Of the illustrations, Figure l is aside view of the Wrench with the chain pendent therefrom. Fig. 2 is a top View of the wrench with the chain within the chain-passage and beneath the steady-pin. Fig. 3 is a side View of the wrench shown as applied to grasp a pipe with one of the jaws shown as broken 5o out and part shown in section. Fig. et shows a side elevation of one of the chain-links. Fig. 5 shows an edge elevation of the form of link shown at Fig. 4. Fig. 6 shows a modified form of link, and Fig. 7 anr edge eleva- 55 tion of the link shown at Fig. 6.

The several parts of the wrench thus illustrated are designated by letter reference, and the function of the parts is described as follows:

The letter H designates the handle; h2, the head Of the handle; J J', the jaws, each made with a straight side part jg, curved jaw gripfacejg, having the serrated edges jt, the beak j, the recessj, and the projection jl.

The letter P designates the steady pin, which is connected to the projection jl by means of the chain K. The function of this pin when inserted in the holes o is to keep the chain from falling away from its encircling 7o grip of what it surrounds and to keep its free end where beyond its grip from falling down. These jaws are each attached to the handlehead h2 at each of the outer sides of the latter, so as to leave the intermediate chain-pas- 75 sage I.

rlhe letter O2 designates the grip chain, which is made of links L, each of which is constructed with an angular grip-pointp and two pivot-holes a a. rlfhese links are arranged 8o in parallel series of two and three links each, each series of two being arranged at each of their opposite pivot ends to tongue in between the adjacent pivot ends of a series of three links, so as to be connected thereat'by pivots 8 5 p2, with such series of two and three links alternatingly connecting to produce the chain C2. In the modiiication shown at Figs. 6 and 7 the links L2 have an angular top and bottorn and the pivot-holes are arranged in the 9o angular ends a2- a2. Vhen the angular links shown at Figs. 6 and 7 are used, the chain has less vertical depth.

The letter Bvdesignates abar projected from the inside of each of the jaw parts J the outer end of which makes a pivotal connection at a4 with the adjacent link of the chain at eachside of the latter.

The device thus made is used as follows: When it is desired to turn a cylinder or pipe, as shown at Fig. 3, the chain is passed around the pipe N.with the free end E carried back through the opening I, so as to be beneath the pin P, inserted through the holes o, made in line oppositely through the projection f of each of the jaw parts, with the chain and parts so placed that when the handle is operated to turn the pipe the angularpoints of the links engage with the surface of the pipe,

so as to make a strong grip on the latter and' to hold the pipe so grasped irmly against the jaws, so that the pipe is turned by the combined action of the chain points, the jaw, and the handle.

I am aware that a chain-wrench has been patented in which the links composing the chain were elliptical in form, having a serrated edge, and were pivotally connected at their ends, with each of the links made with a pinpassage, so that when the chain was passed around a pipe and then carried up through an opening made in the shank between the jaws and handle a pin could be passed through the hole made in the link where beyond the shankpassage to keep the chain in place around the pipe while the wrench was being operated. This construction of the chain necessitated the use of wrenches constructed for different sizes of pipes, from the-fact that the elliptical form of the links having their serrated edges nearly in line with their pivots did not allow of much range in adjustment to different sizes of pipes. Vith my improved chain the links, by means of their angular form, pro-v duce grip-points, while the links by lappingy past one another more or less adjust in their gripping contact radially around the circumference of the pipe, as shown at Fig. 3, so that the same wrench may be used upon a oneineh pipe or a six-inch pipe.

By myimprovement in the form of the links and in making them angular in their shape, so that when connected at opposite corners to form a chain the angle of the links where projected inwardly from their pivotal attachment will produce a grip-point, by which the links radially adjust to engage with different sizes of pipe, which result cannot be had where the links pivotally connected are elliptical in form, with serrated engaging edges, and which latter construction requires a Wrench for differing sizes of pipe, this improvement being due to the new form of link which I use.

While I have shown the series of links composing the chain to consist, alternatingly, of two and threeflinks, yet, if desired, they may consist of alternating series of three and four each.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In a chain-wrench having two jaws made with an up-curve and each projected from each side at the end of an operating-handle, so as to produce an intermediate chainrecess, a chain made of links having an angular form and pivotally connected to each other at opposite corners with the angle cf each of the chain-links where projected inwardly from their pivotal connections, adapted to produce a grip-point, with said chain connected to the under side of the handle and adapted to be passed back between said jaws, substantially in the manner as and for the purposes set forth. t

2. A chain for a chain -wrench, made of links having an angular form and pivotally connected at their opposite corners with the angle of each of the links where projected inwardly, adapted to form a grip-point, substantially in the manner as and for the purposes set forth.

3. A chain for a chain-wrench, made of links having an angular form and pivotally connected at their opposite corners with the angle of each of the links where projected inwardly, adapted to form a grip-point with said links so formed connected in series, so that each has alternatingly an odd and an even number of links that lap past each other at their ends for pivotal connection, substantially in the manner as and for the purposes set forth.

4. The combination, with the handle H, having the jaws J J arranged upon one of its ends at the opposite sides thereof, so as to form the intermediate chain-passage I, each of said jaws being made with the projection f( upon its outer side, substantially as de- IOO scribed, of the chain C2, pivotally connected at its end a4 to said jaws and made of links L, each having an angular form and pivotally connected in series at their opposite corners, and between where thus connected made with the inwardly-projected grip-angle p', and the steady-pin P, constructed to be passed through the projection L7'7 of the jaws above the chain in the passage I, substantially in the manner as and for the purposes set forth.

5. A chain for a chain-wrench, made of links, each having an angular grip-point with said links arranged in series, each having alternatingly an odd and even number of links, with the ends of each of the links of an even-number series at each of theirV opposite ends made to enter between and be pivoted to the ends of the links of an odd-number series, substantially in the manner as and for the purposes set forth,

6. The combination, with the handle H, having the jaws J J arranged upon oneof its ends at the opposite sides thereof, so as to leave the intermediate chain-passage I, each IIO IIS

of said jaws being made with the projection j7 upon its outer side, substantially as described, of the chain C2, pvotally connected Signed at Troy, New York, this 28th day of at one of its ends at a4 to said jaws and made March, 1891, and in the presence ofthe two 1o Y of links L, having the angular grip parts 10', Witnesses Whose naines are hereto Written. and the steady-pin P, constructed to be passed through the projection 7'7 of the jaws FRED. B. IDE. above the chain in the passage I, substan- Witnesses:

t-ially in the manner as and for the purposes CHARLES S. BRINTNALL,

set forth. W. E. HAGAN. 

